组织学与胚胎学课件：2013上皮组织

1、,刘 佳 梅,Epithelial Tissue,Organization : closely aggregated cells little intercellular substance Polarization: polarity free surface basal surface Classification: covering epithelium; glandular epithelium Functions: protection, absorption, secretion, excretion,epithelium,.Covering Epithelium,The type

2、 and structure of covering epi. 1.1 Simple epthelium (1) Simple squamous epithelium Endothelium： Mesothelium：,(2) Simple cuboidal epithelium,follicles of thyroid renal tubule,(3) Simple colummnar epithelium：,gut and uterus of cavities,(4) pseudostratified：,lining of respiratory tract,1.2 Stratified

3、epithelium,(1) Stratified squamous epithelium keratinized epidermis Nonkeratinized ：oral cavity, esophagus,vagina,(2) Stratified colummna epithelium：conjunctiva (3) Transitional epithelium：renal calyces, ureters bladder,2. Specializations of the cell surface,1 Apical surface （1） cell coat: glycocaly

4、x （2） microvillus,（3）cilium,a central pair of microtubules; 9 pairs of peripheral doublet microtubules,2.2 Specializations of the lateral surface,（）tight junction：,(2)Adhesion belt：,amorphous electron-dense material within the gap between 2 adjacent epithelial cells An electron-dense plaque presents

5、 on the cytoplasmic face of the cell membrane. The intermediate filaments of the terminal web insert into the dense plaques. Function: machinery junction,（3）desmosome,（4）gap junction,Function: allow selective diffusion of molecules between adjacent cells and facilitate communication between cells di

6、rectly,junctional complex,(1) basement membrane,2.3 Specializations of the basal surface,basal lamina reticular lamina,（2） plasma membrane infolding,（3）hemidesmosome,.glandular epithelium and gland,endocrine gland exocrine gland,Type of exocrine gland,Serous glands Mucous glands Mixed glands,The type of gla